Everyday Tools
Handy little tools for everyday tasks: timers and counters, unit and currency converters, health and money calculators, and code and QR generators.
Health & body
Blood Alcohol
Estimate your blood alcohol concentration in per mille with the Widmark formula, based on the drink, your weight and the time elapsed.
BMI Calculator
Calculate your BMI from weight and height and see your WHO category.
BMR Calculator
Estimate your basal metabolic rate and daily calories (TDEE) with three formulas.
Body Fat Calculator
Estimate your body fat percentage with the US Navy tape method or a BMI-based formula, plus your fat mass and lean mass, in metric or imperial units.
Calorie Calculator
Estimate your daily calorie needs (BMR and TDEE) from your sex, age, height, weight and activity level, with targets for losing, maintaining or gaining weight.
Protein Calculator
Estimate your daily protein needs from your body weight and goal, from general health to building muscle or losing fat. Metric and imperial units.
Water Intake Calculator
Estimate how much water to drink each day from your body weight, exercise and climate, with the amount in liters, cups, ounces and glasses, alongside the EFSA and US health baselines.
Time & date
Age Calculator
Calculate your exact age in years, months and days, plus totals and your next birthday.
Counter
A simple tap counter. Count up or down with one tap, great for reps, people, stitches or inventory.
Date Calculator
Work out the days between two dates, or add and subtract days, weeks, months and years from a date. Shows the duration, total days and the weekday.
Industrial Minutes
Convert clock time to industrial minutes (decimal time) and back. Enter hours and minutes to get industrial minutes and decimal hours, or reverse it.
Time Zone Converter
Convert a time across the world's major time zones, with daylight saving handled automatically.
Timer & Stopwatch
A countdown timer and a stopwatch in one. Set hours, minutes and seconds for the timer, or track laps with the stopwatch. Includes an alarm sound.
Money & math
Currency Converter
Convert between 30+ currencies using daily European Central Bank reference rates.
Degree Grade Calculator
Calculate your Italian degree grade on the 110 scale from exams, CFU and thesis points.
Discount
Calculate the final price after a percentage discount, or find the discount percentage from the original and sale price.
Electricity Cost
Work out what an appliance costs to run from its power draw, daily usage and your price per kWh.
Fuel Cost
Work out the fuel cost of a trip from distance, consumption and fuel price, and split it between passengers.
Grade Calculator
Calculate your weighted grade average from German school grades (1 to 6) with custom weights.
Percentage Calculator
Work out percentages six ways, from percent of a value to percentage change.
Rule of Three
Solve proportional and inverse rule-of-three problems: if A corresponds to B, what does C correspond to?
Tip Calculator
Work out the tip and split the bill between any number of people, with optional rounding up.
Generators
Codes & barcodes
Barcode
Create Code 128, EAN, UPC and more, one barcode per line, and download them as PNG, SVG, or a zip.
Code 128
Generate dense Code 128 barcodes for SKUs, serials, and logistics labels, single or in bulk, as PNG or SVG.
EAN-13
Generate EAN-13 retail barcodes with the check digit computed for you, single or in bulk, as PNG or SVG.
QR Code Generator
Create a QR code from any text or URL and download it as PNG or SVG.